forked from keys-pub/keys-ext
/
autostart.go
122 lines (111 loc) · 2.52 KB
/
autostart.go
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package service
import (
"os"
"os/exec"
"runtime"
"strings"
"time"
"github.com/mitchellh/go-ps"
"github.com/pkg/errors"
)
func findProcessByName(name string) (ps.Process, error) {
processes, err := ps.Processes()
if err != nil {
return nil, err
}
for _, p := range processes {
exe := p.Executable()
if exe == name || (runtime.GOOS == "windows" && exe == name+".exe") {
logger.Debugf("Found process: %+v", p)
return p, nil
}
}
logger.Debugf("Process not found (%s)", name)
return nil, nil
}
func autostart(env *Env) error {
logger.Infof("Autostart")
if err := startProcess(env); err != nil {
if err == errAlreadyRunning {
logger.Debugf("Already running")
return nil
}
return err
}
logger.Debugf("Autostarted")
return waitForStart(env)
}
func clearPID(env *Env) error {
pidPath, err := env.AppPath("pid", false)
if err != nil {
return err
}
if err := removeFile(pidPath); err != nil {
return err
}
return nil
}
func waitForStart(env *Env) error {
pidPath, err := env.AppPath("pid", false)
if err != nil {
return err
}
logger.Debugf("Waiting for pid: %s", pidPath)
_, perr := waitForPID(pidPath, nil, time.Second, 20*time.Second)
if perr != nil {
return perr
}
return nil
}
var errNotRunning = errors.New("not running")
var errAlreadyRunning = errors.New("already running")
func startProcess(env *Env) error {
logger.Debugf("Start process")
ps, err := findProcessByName(env.build.ServiceName)
if err != nil {
return err
}
if ps != nil {
return errAlreadyRunning
}
binPath := defaultServicePath(env.build.ServiceName)
appName := env.AppName()
logPath, err := env.LogsPath("keysd.log", true)
if err != nil {
return err
}
args := []string{
"-app", appName,
"-log-path", logPath,
}
logger.Debugf("Starting %s %s", binPath, strings.Join(args, " "))
cmd := exec.Command(binPath, args...) // #nosec
return cmd.Start()
}
func stopProcess(env *Env) error {
logger.Debugf("Stop process")
ps, err := findProcessByName(env.build.ServiceName)
if err != nil {
return err
}
if ps == nil {
return errNotRunning
}
process, findErr := os.FindProcess(ps.Pid())
if findErr != nil {
return findErr
}
if process == nil {
logger.Debugf("Process pid not found %d", ps.Pid())
return errNotRunning
}
logger.Debugf("Killing process %d", ps.Pid())
if err := process.Kill(); err != nil {
return err
}
logger.Debugf("Waiting for process %d to exit", ps.Pid())
if err := waitForProcessExit(ps.Pid(), time.Millisecond*500, time.Second*10); err != nil {
return err
}
return nil
}